Software Architect - AdTech

About the role

Sigma Software's AdTech business unit, called Stellar, is looking for a Software Architect with deep expertise in distributed systems, cloud-native architectures and high-load platforms. You will drive architectural decisions, design scalable and resilient solutions and influence the technical direction of complex AdTech products, working with engineering teams, customers and business stakeholders. The unit partners with industry leaders and startups across programmatic advertising, covering SSPs, DSPs, RTB infrastructure, analytics, identity frameworks and privacy-first solutions. Remote or hybrid cooperation can be discussed depending on your location.

Key responsibilities

• Define and drive the architecture of scalable AdTech solutions and distributed cloud platforms across multiple initiatives
• Own architectural decisions and set technical direction aligned with business objectives and long-term product strategy
• Lead technical discovery, architecture assessments and solution design, translating business requirements into scalable, secure solutions
• Drive technical pre-sales: customer presentations, architecture workshops, solution proposals, estimations and proofs of concept
• Showcase AdTech expertise to prospective clients and support new business, and expand existing customer engagements through consulting and architecture advisory
• Establish architectural standards, governance principles and engineering best practices
• Guide engineering teams on implementation, scalability, performance optimization and distributed systems design
• Evaluate emerging technologies, including AI-driven solutions, and mentor engineers and share knowledge

Required profile

• At least 7 years of commercial software development experience
• Minimum 3 years in architecture or technical leadership roles
• Proven experience designing high-load, low-latency distributed systems and cloud-native architectures
• Experience in customer-facing technical consulting and pre-sales
• Upper-intermediate English; AdTech domain experience is a plus

Required skills

• Hands-on expertise in at least two of: Golang, Rust, Node.js, C++
• Docker, Kubernetes, Helm
• AWS, GCP or Azure production environments
• REST APIs, gRPC, WebSockets, Kafka, Kinesis or Pub/Sub
• Microservices, messaging, caching and API design
• Plus: programmatic advertising ecosystems (SSP, DSP, OpenRTB, Prebid, VAST), SDK/API design, GDPR/CCPA and privacy-first architectures

What we offer

• Diversity of domains and businesses, variety of technologies
• Health and legal support, active professional community, continuous education
• Flexible schedule and remote work options
• Outstanding offices, sports and community activities